gomp-20050608-branch/libjava/classpath/gnu/classpath/jdwp/processor/MethodCommandSet.java

   1 /* MethodCommandSet.java -- class to implement the Method Command Set
   2    Copyright (C) 2005 Free Software Foundation
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package gnu.classpath.jdwp.processor;
  40
  41 import gnu.classpath.jdwp.JdwpConstants;
  42 import gnu.classpath.jdwp.VMVirtualMachine;
  43 import gnu.classpath.jdwp.exception.JdwpException;
  44 import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
  45 import gnu.classpath.jdwp.exception.NotImplementedException;
  46 import gnu.classpath.jdwp.id.ObjectId;
  47 import gnu.classpath.jdwp.id.ReferenceTypeId;
  48 import gnu.classpath.jdwp.util.LineTable;
  49 import gnu.classpath.jdwp.util.VariableTable;
  50
  51 import java.io.DataOutputStream;
  52 import java.io.IOException;
  53 import java.lang.reflect.Method;
  54 import java.nio.ByteBuffer;
  55
  56 /**
  57  * A class representing the Method Command Set.
  58  *
  59  * @author Aaron Luchko <aluchko@redhat.com>
  60  */
  61 public class MethodCommandSet
  62   extends CommandSet
  63 {
  64   public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
  65       throws JdwpException
  66   {
  67     try
  68       {
  69         switch (command)
  70           {
  71           case JdwpConstants.CommandSet.Method.LINE_TABLE:
  72             executeLineTable(bb, os);
  73             break;
  74           case JdwpConstants.CommandSet.Method.VARIABLE_TABLE:
  75             executeVariableTable(bb, os);
  76             break;
  77           case JdwpConstants.CommandSet.Method.BYTE_CODES:
  78             executeByteCodes(bb, os);
  79             break;
  80           case JdwpConstants.CommandSet.Method.IS_OBSOLETE:
  81             executeIsObsolete(bb, os);
  82             break;
  83           case JdwpConstants.CommandSet.Method.VARIABLE_TABLE_WITH_GENERIC:
  84             executeVariableTableWithGeneric(bb, os);
  85             break;
  86           default:
  87             throw new NotImplementedException(
  88               "Command " + command + " not found in Method Command Set.");
  89           }
  90       }
  91     catch (IOException ex)
  92       {
  93         // The DataOutputStream we're using isn't talking to a socket at all
  94         // So if we throw an IOException we're in serious trouble
  95         throw new JdwpInternalErrorException(ex);
  96       }
  97
  98     return false;
  99   }
 100
 101   private void executeLineTable(ByteBuffer bb, DataOutputStream os)
 102       throws JdwpException, IOException
 103   {
 104     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
 105     Class clazz = refId.getType();
 106
 107     ObjectId oid = idMan.readObjectId(bb);
 108     Method method = (Method) oid.getObject();
 109
 110     LineTable lt = VMVirtualMachine.getLineTable(clazz, method);
 111     lt.write(os);
 112   }
 113
 114   private void executeVariableTable(ByteBuffer bb, DataOutputStream os)
 115       throws JdwpException, IOException
 116   {
 117     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
 118     Class clazz = refId.getType();
 119
 120     ObjectId oid = idMan.readObjectId(bb);
 121     Method method = (Method) oid.getObject();
 122
 123     VariableTable vt = VMVirtualMachine.getVarTable(clazz, method);
 124     vt.write(os);
 125   }
 126
 127   private void executeByteCodes(ByteBuffer bb, DataOutputStream os)
 128       throws JdwpException
 129   {
 130     // This command is optional, determined by VirtualMachines CapabilitiesNew
 131     // so we'll leave it till later to implement
 132     throw new NotImplementedException("Command ByteCodes not implemented.");
 133   }
 134
 135   private void executeIsObsolete(ByteBuffer bb, DataOutputStream os)
 136       throws IOException
 137   {
 138     // The debugger is really asking if this method has been redefined using
 139     // VirtualMachineCommandSet.RedefineClasses. Since we don't implement that
 140     // command the answer to this will always be false.
 141     os.writeBoolean(false);
 142   }
 143
 144   private void executeVariableTableWithGeneric(ByteBuffer bb,
 145                                                DataOutputStream os)
 146       throws JdwpException
 147   {
 148     // We don't have generics yet
 149     throw new NotImplementedException(
 150       "Command SourceDebugExtension not implemented.");
 151   }
 152
 153 }